TLDR version, I would be ok with fighter and rogue classes. Thanks for all of the input guys (and the luck too, Christopher). Johnathan, I have to disagree with one point. MANY military forces in history were made up of the same kind of "fighter" who were trained ala cookie cutter methods to produce soldiers with common training. With that said, certainly most military forces have had "special forces" units. I think the reason I was anti-class variance when I thought of this was that a spell caster in this scenario will radically change the CR of challenges. Around about 5th level when the Wizard starts dropping fireballs, the combats change radically. I was hoping for a more smooth progression in that respect. Also, I was hoping for a large number of players, and KISS - keep it simple stupid - made a lot of sense to me. Nothing says the campaign can't evolve, or that teachers/trainers can't be found in the future. I just wanted to keep it simple at first. It also hit me last night while driving home that it would be an interesting game to have an "expeditionary force" of devils come to the prime material plane and set up shop. Somehow one of the higher level devils has found a way to sneak 30, 1 HD devils here without them being noticed. These lesser devils could set up shop in the castle as suggested for the fighter game, or just wander the wilderness seeking to destroy. I thought their progression would be to "evolve" into other devils as they gain xp. I thought that the price to evolve from one devil to the other would require the player to earn xp equivalent to the xp value of the monster in question when it is killed. i.e., the player may begin play as an imp, or a lemure or something similar (under 1000 xp value), and when they have accumulated 1600 xp they can evolve into a Bearded Devil, for instance. At 6400 xp they could become a Faceless Devil. You could evolve as many times as you like, and players can take different paths. I think it would be interesting. The list of devils is as follows on the SRD: Least Devils : imps, lemures Lesser Devils : bearded devils (barbazus), erinyes, barbed devils (hamatulas), bone devils (osyluths) Greater Devils : horned devils (cornugons), ice devils (gelugons), pit fiends More extensive list: Devil, Advodaza (Nemesis Devil) Devil, Amaimon (Interrogator Devil) Devil, Arusities (Doll Devil) Devil, Ashmede (Judgement Devil) Devil, Ashmede (Judgement Devil-3PP) Devil, Atropocustra (Addiction Devil) Devil, Ayngavhaul (Heresy Devil) Devil, Barbazu (Bearded Devil) Devil, Bdellavritra (Belier) Devil, Castigas (Automata) Devil, Chort (Pig-Faced Devil) Devil, Cornugon (Horned Devil) Devil, Deathleech Horned Devil, Deimavigga (Apostate Devil) Devil, Erinyes (The Furies) Devil, Faceless Devil, Gaav (Lesser Host Devil) Devil, Garugin (Blood Reaver) Devil, Gelugon (Ice Devil) Devil, Ghaddar (Devourer Devil) Devil, Gilded Devil, Gladiatrix (Domination Devil) Devil, Gylou (Handmaiden Devil) Devil, Hamatula (Barbed Devil) Devil, Hesperian (Accomplice Devil) Devil, Imp Devil, Ink (3PP) Devil, Lemure Summoned Creature: Lemure Devil, Levaloch (Warmonger) Devil, Lilin Devil, Magaav (Greater Host Devil) Devil, Marnasoth (Hellstoker) Devil, Marzach (Flayer) Devil, Nupperibo Devil, Osyluth (Bone Devil) Devil, Phistophilus (Contract Devil) Devil, Pit Fiend Devil, Puragaus (Immolation Devil) Devil, Salikotal (Vengeance Devil) Devil, Sarglagon (Drowning Devil) Devil, Shadow Angel Devil, Tormentor (Tormentor of Souls) Devil, Whiptail Devil, Zebub (Accuser Devil) Devils, Unique Create your own unique devil within guidelines provided. This should create a whole host of options, with so many unfortold consequences, and strife among the devils to be the leader, etc. Could be a fun version as well.